[Ian83w]

Hi all had my new 440lci just over a month got approx 700mls on her. Just fired her up and all I can say is what a horrible noise from the left exhaust pipe. I no not the 140s on other forum have been experiencing this problem. So it seems to have followed suit also. I no it's the flap that closes off on cold start up then opens. But what a embarrassing situation when u have a expensive car and my van sounded better. Ive videoed it so will see if it does it again. As I think u have to record it more than once to prove an issue is there. Has anybody else had this problem with such low mileage. Thanks in advance guys
Here a video

[uncleruckus]

Most likely the exhaust valve or valve actuator. Take it back to dealership and your warranty should cover it.

[Ian83w]

Originally Posted by uncleruckus

Most likely the exhaust valve or valve actuator. Take it back to dealership and your warranty should cover it.

Yeah think I may need a few more occasions of it happening 1st tho but will definitely be goin to get it sorted

[acslater]

+1 for exh valve

[adhrp]

Lol seems to be an epidemic of exhaust rattles. My F30's exhaust also started rattling a month or so ago (it's a 2012 though and it is the first time it happened). I plan to get it checked out during my next oil change. Overall, there seems to be an increase in exhaust rattle threads lately.

[BMW11]

i had that sound on my 340 when i first got it at 6 miles new, but it went away eventually. I dont notice it any more and i usually listen to it as i close my garage door after first starting and after a drive it just purrs now. I have 1100 miles. yours may just go away by itself like mine did maybe it takes the metals time to break in the temperatures normalizing its like the exhaust is heat treating the metals when new and takes time to "break in" the dealer would proplebt say its normal after they see its not hanging wrong or something and say its normal. good luck with it

[Katin]

Some would pay extra for that sound!

[eluded]

My 340 as the same issue. I brought it into the dealer to have that rattle investigated and they kept the car overnight. They told me they were unable to replicate the issue. They went ahead and scratched the rear bumper for me. This got me to thinking that the rattle wasn't in the engine bay but rather from the exhaust. Sure enough, definitely the exhaust. Usually the car has to be sitting for 12+ hours but every time it starts cold, it rattles.

[Mr.G20 M340]

Originally Posted by eluded

They went ahead and scratched the rear bumper for me.

Wait, wut?! They scratched your car?

I had the same issue with my 335 when i did the muffler delete, but then i learned that the valves need to be open up, did that and it was fine. W/ the 340 i went and did both resonators and mufflers and kept valves unplugged and no issue.

[aigochamaloh]

Wife's 340i has been doing this from day one, most prominent on cold starts, but can hear the rattle around 3-4l rpm. First visit for oil change, the SA didn't even write it up, saying it's the valve operating and it's normal. I said it's not. Took it back in this past week, they've had the car since Saturday. Was just informed car is ready, they replaced the entire muffler as something internally was rattling.

[BMW11]

Originally Posted by eluded

My 340 as the same issue. I brought it into the dealer to have that rattle investigated and they kept the car overnight. They told me they were unable to replicate the issue. They went ahead and scratched the rear bumper for me. This got me to thinking that the rattle wasn't in the engine bay but rather from the exhaust. Sure enough, definitely the exhaust. Usually the car has to be sitting for 12+ hours but every time it starts cold, it rattles.

I always dread bringing my car in for service wondering what they are gonna do to it its as if its 'standard' to leave with more 'blemishes' then arriving. their priority is NOT to be careful with peoples cars, their priority is do as many cars as possible FAST. this is a formula for almost assured risk and damage. then they deny it if you say hey you scratched my car washing it when i said not to, they stare at you and say nothing but i see it in their eyes that they are thinking 'ok mister please take your car and go home" sad

[BMW11]

Originally Posted by aigochamaloh

Wife's 340i has been doing this from day one, most prominent on cold starts, but can hear the rattle around 3-4l rpm. First visit for oil change, the SA didn't even write it up, saying it's the valve operating and it's normal. I said it's not. Took it back in this past week, they've had the car since Saturday. Was just informed car is ready, they replaced the entire muffler as something internally was rattling.

It seems like dealers SA's go to school and are taught initially to always say: "its normal" and "can not replicate" and then ONLY if you keep bringing it back and complaining, then they are taught to go to the next step: "ok mister we will fix it now since you keep bothering us " lol

[Ian83w]

Originally Posted by BMW11

It seems like dealers SA's go to school and are taught initially to always say: "its normal" and "can not replicate" and then ONLY if you keep bringing it back and complaining, then they are taught to go to the next step: "ok mister we will fix it now since you keep bothering us " lol

Lol yeah well if I had turned up t a dealer for a test drive and it sounded like this I bet it would be pretty embarrassing for them. I bet they would have it changed quicker than a flash of lightning haha. It's only done it once so I will keeping my ears peeled haha. Yes could be the metals and valves just bedding them selves in. Time will tell but just thought I'd ask if anyone else has had similar problems thanks for all replies guys.

[Ian83w]

Originally Posted by aigochamaloh

Wife's 340i has been doing this from day one, most prominent on cold starts, but can hear the rattle around 3-4l rpm. First visit for oil change, the SA didn't even write it up, saying it's the valve operating and it's normal. I said it's not. Took it back in this past week, they've had the car since Saturday. Was just informed car is ready, they replaced the entire muffler as something internally was rattling.

They are funny arnt they. NOTHING WRONG well there is think bmw need to admit that there is a faulty exhaust system proberbly on all fx40 so should do a recall. And give us all mppsk as an inconvenience freebie now that would make me

[joec1101]

No, it's not right. Something's loose. Insist that the dealer correct it. If they can't get it straightened out, try another dealer. My friend's 228i had the same problem developed after about 25k miles and the dealer fixed it.

[mike@x-ph.com]

Originally Posted by Ian83w

Yeah think I may need a few more occasions of it happening 1st tho but will definitely be goin to get it sorted

Let us know what the dealership says

[aigochamaloh]

Originally Posted by Ian83w

They are funny arnt they. NOTHING WRONG well there is think bmw need to admit that there is a faulty exhaust system proberbly on all fx40 so should do a recall. And give us all mppsk as an inconvenience freebie now that would make me

It was the same with my speakers in my 340i. I said I was clearly lacking bass compared to my wife's car, but they returned it after an oil change saying working fine. I sat with the tech, did fader and balance adjustments, then he finally agreed the right side bass wasn't working. Turns out the underseat sub wasn't plugged in from the factory.

My push now is that my wife and I both have 340s, this one isn't behaving like the other one.

All stuff I could have diagnosed and fixed at home, but it's under warranty, might as well let them figure it out, if they actually get around to it. I have enough old cars to maintain in the family as is.

[Ian83w]

Originally Posted by joec1101

No, it's not right. Something's loose. Insist that the dealer correct it. If they can't get it straightened out, try another dealer. My friend's 228i had the same problem developed after about 25k miles and the dealer fixed it.

Well mine has only 700mls on it so u would of expected a better lifespan on that part surely. Seems as tho the quality bmw once had has become abit more lax over the last few years. More quantity than quality. But that nearly in every walk I f loved these days. Seems a shame as these cars are lovely . I'm sure it will get sorted. Thank god for warranties

[Ian83w]

Originally Posted by aigochamaloh

It was the same with my speakers in my 340i. I said I was clearly lacking bass compared to my wife's car, but they returned it after an oil change saying working fine. I sat with the tech, did fader and balance adjustments, then he finally agreed the right side bass wasn't working. Turns out the underseat sub wasn't plugged in from the factory.

My push now is that my wife and I both have 340s, this one isn't behaving like the other one.

All stuff I could have diagnosed and fixed at home, but it's under warranty, might as well let them figure it out, if they actually get around to it. I have enough old cars to maintain in the family as is.

Yeah they think we must be stupid when we raise issues. Hello we have a clue about cars or we wouldn't of bought x40s. They are a lovely bit of kit just annoying little issues. Hope u get your sorted. At least u will have a better chance of knowing when things are wrong as u have an exact comparison as well